From: Jarkko Sakkinen <jarkko@kernel.org>
To: lkp@lists.01.org
Subject: Re: [KEYS] 4a00e5e212: WARNING:at_arch/x86/kernel/static_call.c:#__static_call_validate
Date: Wed, 17 Mar 2021 23:00:41 +0200 [thread overview]
Message-ID: <YFJt+eRHG6K/hwGu@kernel.org> (raw)
In-Reply-To: <CAFA6WYNs-rQLUGPMwc-p0q_KRvR16rm-x55gDqw828c7-C1qeA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 4776 bytes --]
On Wed, Mar 17, 2021 at 05:25:48PM +0530, Sumit Garg wrote:
> On Wed, 17 Mar 2021 at 14:32, Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > On Wed, Mar 17, 2021 at 09:59:32AM +0100, Peter Zijlstra wrote:
> > > diff --git a/tools/objtool/check.c b/tools/objtool/check.c
> > > index 5e5388a38e2a..6fef1155e73a 100644
> > > --- a/tools/objtool/check.c
> > > +++ b/tools/objtool/check.c
> > > @@ -850,6 +850,21 @@ static int add_ignore_alternatives(struct objtool_file *file)
> > > return 0;
> > > }
> > >
> > > +static inline void static_call_add(struct instruction *insn,
> > > + struct objtool_file *file)
> > > +{
> > > + if (!strcmp(insn->sec->name, ".exit.text")) {
> > > + WARN_FUNC("static_call in .exit.text, skipping inline paching",
> > > + insn->sec, insn->offset);
> > > + return;
> > > + }
> >
> > Duh, that needs to be in the below condition... /me goes fetch more
> > wake-up juice :/
> >
> > > + if (insn->call_dest->static_call_tramp) {
> > > + list_add_tail(&insn->static_call_node,
> > > + &file->static_call_list);
> > > + }
> > > +}
> >
> > ---
> > tools/objtool/check.c | 32 ++++++++++++++++++++------------
> > 1 file changed, 20 insertions(+), 12 deletions(-)
> >
>
> Thanks Peter for this fix. It does work for me on qemu for x86. Can
> you turn this into a proper fix patch? BTW, feel free to add:
>
> Tested-by: Sumit Garg <sumit.garg@linaro.org>
Peter, if possible, please also CC the proper fix to me, I'll ack the fix.
Relevant for keyring.
Thanks!
/Jarkko
>
> -Sumit
>
> > diff --git a/tools/objtool/check.c b/tools/objtool/check.c
> > index 5e5388a38e2a..70cfd8bf95fd 100644
> > --- a/tools/objtool/check.c
> > +++ b/tools/objtool/check.c
> > @@ -850,6 +850,22 @@ static int add_ignore_alternatives(struct objtool_file *file)
> > return 0;
> > }
> >
> > +static inline void static_call_add(struct instruction *insn,
> > + struct objtool_file *file)
> > +{
> > + if (!insn->call_dest->static_call_tramp)
> > + return;
> > +
> > + if (!strcmp(insn->sec->name, ".exit.text")) {
> > + WARN_FUNC("static_call in .exit.text, skipping inline paching",
> > + insn->sec, insn->offset);
> > + return;
> > + }
> > +
> > + list_add_tail(&insn->static_call_node,
> > + &file->static_call_list);
> > +}
> > +
> > /*
> > * Find the destination instructions for all jumps.
> > */
> > @@ -888,10 +904,7 @@ static int add_jump_destinations(struct objtool_file *file)
> > } else if (insn->func) {
> > /* internal or external sibling call (with reloc) */
> > insn->call_dest = reloc->sym;
> > - if (insn->call_dest->static_call_tramp) {
> > - list_add_tail(&insn->static_call_node,
> > - &file->static_call_list);
> > - }
> > + static_call_add(insn, file);
> > continue;
> > } else if (reloc->sym->sec->idx) {
> > dest_sec = reloc->sym->sec;
> > @@ -950,10 +963,7 @@ static int add_jump_destinations(struct objtool_file *file)
> >
> > /* internal sibling call (without reloc) */
> > insn->call_dest = insn->jump_dest->func;
> > - if (insn->call_dest->static_call_tramp) {
> > - list_add_tail(&insn->static_call_node,
> > - &file->static_call_list);
> > - }
> > + static_call_add(insn, file);
> > }
> > }
> > }
> > @@ -2746,10 +2756,8 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
> > if (dead_end_function(file, insn->call_dest))
> > return 0;
> >
> > - if (insn->type == INSN_CALL && insn->call_dest->static_call_tramp) {
> > - list_add_tail(&insn->static_call_node,
> > - &file->static_call_list);
> > - }
> > + if (insn->type == INSN_CALL)
> > + static_call_add(insn, file);
> >
> > break;
> >
>
next prev parent reply other threads:[~2021-03-17 21:00 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 14:23 [KEYS] 4a00e5e212: WARNING:at_arch/x86/kernel/static_call.c:#__static_call_validate kernel test robot
2021-03-16 8:04 ` Sumit Garg
2021-03-17 3:01 ` Oliver Sang
2021-03-17 7:25 ` Sumit Garg
2021-03-17 8:41 ` Peter Zijlstra
2021-03-17 8:59 ` Peter Zijlstra
2021-03-17 9:02 ` Peter Zijlstra
2021-03-17 11:55 ` Sumit Garg
2021-03-17 12:45 ` [PATCH] objtool, static_call: Don't emit static_call_site for .exit.text Peter Zijlstra
2021-03-17 12:45 ` [PATCH] objtool,static_call: " Peter Zijlstra
2021-03-17 13:37 ` [PATCH] objtool, static_call: " Sumit Garg
2021-03-17 13:37 ` [PATCH] objtool,static_call: " Sumit Garg
2021-03-17 21:55 ` [PATCH] objtool, static_call: " Jarkko Sakkinen
2021-03-17 21:55 ` [PATCH] objtool,static_call: " Jarkko Sakkinen
2021-03-18 4:42 ` [PATCH] objtool, static_call: " Sumit Garg
2021-03-18 4:42 ` [PATCH] objtool,static_call: " Sumit Garg
2021-03-17 21:01 ` [PATCH] objtool, static_call: " Jarkko Sakkinen
2021-03-17 21:01 ` [PATCH] objtool,static_call: " Jarkko Sakkinen
2021-03-18 0:02 ` [PATCH] objtool, static_call: " Josh Poimboeuf
2021-03-18 0:02 ` [PATCH] objtool,static_call: " Josh Poimboeuf
2021-03-18 7:59 ` [PATCH] objtool, static_call: " Peter Zijlstra
2021-03-18 7:59 ` [PATCH] objtool,static_call: " Peter Zijlstra
2021-03-18 8:30 ` [PATCH] objtool, static_call: " Peter Zijlstra
2021-03-18 8:30 ` [PATCH] objtool,static_call: " Peter Zijlstra
2021-03-18 8:47 ` [PATCH] objtool, static_call: " Peter Zijlstra
2021-03-18 8:47 ` [PATCH] objtool,static_call: " Peter Zijlstra
2021-03-17 21:00 ` Jarkko Sakkinen [this message]
2021-03-18 10:25 ` [KEYS] 4a00e5e212: WARNING:at_arch/x86/kernel/static_call.c:#__static_call_validate Peter Zijlstra
2021-03-18 11:03 ` Sumit Garg
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